Dust cover for reflectors



Feb. 6, 1934. DOANE I 1,945,738

DUST COVER FOR REFLECTORS Filed May 2, 1950 INVENTOR Leroy (lfloane BY ATTORN EY Patented Feb. 6, 1934 UNITED STATES PATENT orric'c Miller Company, Meriden,

tion of Connecticut Conn., a corpora- Application May 2, 1930. Serial No. 449,154

13 Claims.

The present invention relates to dust covers for reflectors and more particularly to means for detachably securing the cover to the reflector.

The present invention contemplates an improved cover supporting means for use on reflectors and employing an expansible and contractible sheet metal band adapted to embrace both the cover and the reflector flange and provided with an operating lever and spring designed to permit securely holding the cover in place or expanding the band to release the cover.

The invention also contemplates the provision of means for retaining the expanded band on the reflector flange.

The invention also contemplates an improved hinge and support for the cover whereby the same may hang freely from the band.

Other and further objects of the invention will be apparent as the description proceeds.

The accompanying drawing shows, for purposes of illustrating the present invention, one embodiment in which the invention may take form,

together with modifications of certain parts, it

being understood that the drawing is illustrative of the invention rather than limiting the same.

In the drawing:

Figure l is a side elevational View of the reflector with the cover hanging down;

Figure 2 is a side elevational view in the direction of the arrow 2 of Figure 1 to show the clamping means in closed position;

Figure 2a is a sectional view through the reflector and cover with the cover clamped in place;

Figure 3 is a sectional view taken on the line sition of the parts with the band expanded;

Figures 4 and 4a are views similar to Figures 2 and 2a, showing the band expanded;

Figure 5 is a fragmentary elevational view taken in the direction of the arrow 5 of Figure 1;

Figure 6 is a sectional view on the line 6-6 of Figure 5;

Figure'7 is an inverted plan view taken in the direction of the arrow 7 of Figure 1;

Figure Sis a section on the line 8-8 of Figure 7;

Figure 9 is a plan view of the gasket taken in the direction opposite the arrow 7 of Figure 1; and V Figure 10 is a sectional view through the overlapping ends of the band and showing a modified form of construction.

The reflector, of conventional form, is indicated at 10 in Figure 1. It has the usual outwardly ex- 3-3 of Figure 2 showing, in dotted lines, the po-' tending flange 11 at the lower end. This flange is utilized for supporting the cover.

For convenience, the cover here shown is a plain flat disk of glass 12. It is provided with a gasket 13, adapted to protect the edge of the glass and provide a dust-tight joint. This gasket is made out of a suitable length of cylindrical lamp wicking. The lamp wick is cut to the proper length so that when folded as indicated it will just fit the periphery of the glass. A split wire ring 14 is passed through the wicking and this ring is long enough to have the ends overlap, as indicated at 15 in Figure 5. A second wire ring 16 is passed through the wicking. This ring is unlike the ring 14, as it is provided with downwardly extending portions 17 bent to provide eyes 18, as indicated in Figures 7 and 8. A bolt 19 is passed through these eyes and this bolt provides a suspension member for the cover when hanging in the position indicated in Figure 1. In order to hold the wicking in place on the glass, the ends are stitched, as indicated at 20 in Figure 9.

This cover or any other suitable form of cover is adapted to be held in place on the reflector by anexpansible and contractible sheet metal ring so 25. This ring is of U-shaped cross section, as will be apparent from the drawing, and is somewhat longer than the periphery of the flange on the reflector. It has overlapping portions, as indicated at 25c and 25b. The outer overlapping s5 portion 25a is slotted, as indicated at 26, to accommodate a spring anchorage member 27 struck out from the inner end portion 25b of the ring.

A clamping lever 28 is pivoted to the outer portion of the band, as indicated at 29. One end of this on lever is provided with an outwardly bent spring anchorage 30, and a tension spring 31 is fastened to the two anchorages 27 and 30.

When the lever is in the band-contracting position shown in Figures 2 and 3, it will be noted that the thumb piece 32 is midway between the sides of the band, so as to be easily engageable for actuating the lever. The lever is held against the spring anchorage 27 by the tension spring 31. When the lever is turned counter clockwise, it moves to the position shown in Figure 1, and the inherent resiliency of the band brings about its expansion. There may be some push exerted on the band by the anchorage 30 pushing on the spring 31, and this in turn pushing on the anchorage 27. When the actuating lever is in the position shown in Figure 4, it is brought against a stop 33. When the lever is in the position shown in Figure 2, the band is contracted and clamps the cover closely against the reflector flange, making a very tight supports the spring, and the parts guide the overjoint, as indicated in Figure 2a. When, however, the band is expanded as shown in Figure 4, it is moved outwardly, as indicated in Figure 4a. The band may then be pushed to the right, as indicated in Figure 8, and the cover to the left, as there indicated, so as to release the opposite side of the cover from the band, allowing the cover to lower so that it may hang as indicated in Figure l.

The hanging cover is supported by a strap 34, welded or otherwise secured to the band 25, and shown in Figures '7 and 8. This strap extends downwardly to be below the bolt 19 and is bent inwardly, as indicated at 35. Ordinarily it is out of contact with the bolt 19 or may be in contact as occasion requires. The return bent part 35 prevents the accidental removal of the bolt 19 from the cover supporting hook 34.

In order to insure that the band will not accidentally come off the flange of the reflector when the band is expanded, a band-retaining device is provided in the form ofa plate 40, pivoted at 41 in the upper side 43 of the band. This plate is adapted to project outwardly through a slot 44 in the band and to be in the path of the lever when the lever is swung to the band-expanding position, as shown in Figure l. The lever is provided with an extension 45 adapted to engage the outer edge of the plate 4.0 and cam it inwardly as shown in Figure 5, thereby pushing this plate in over the flange 11 of the reflector. This efiectively narrows up the opening of the expanded band and keeps the band on the flange. At the same time the parts are so arranged that there is nothing to interfere with contracting the band.

In Figure 10 a slightly modified form of construction is shown. Here the inner portion 25b of the band is provided with a lateral extension 250 which carries a spring anchorage 270. This extension 250 and anchorage 27c act the same as the slot 26 and anchorage 27 in that the anchorage lapping ends of the band so that they slide relative to one another without being displaced by the operation of the lever.

This cover supporting device is one which may be made up out of readily constructed parts easily assembled. The mode of operating the device will be obvious to anyone, so that no difiiculty will arise when cleaning or relamping the fixture.

The gasket construction forms the subject matter of a separate application about to be filed.

It is obvious that the invention may be embodied in many forms. and constructions within the scope of the claims, and I wish it to be understood that the particular form shown is but one of the many forms. Various modifications and changes being possible, I do not otherwise limit myself in any way with respect thereto.

I claim:

1. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade and having overlapping end portions adapted to slide relative to one another as the band is expanded or contracted, and means for contracting said band comprising a lever pivoted to the outer end portion of the band to swing in a plane transverse of the plane of the band, the lever being connected to a tension spring, the other end of the spring being connected to a member carried by the other end portion and projecting outwardly, and guiding means whereby the end portions slide relative to one another and are prevented from twisting away from one another when the lever is swung.

2. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade and having overlapping end portions adapted to slide relative to one another as the band is expanded or contracted, and means for contracting said band comprising a lever pivoted to the outer end portion of the band to swing in a plane transverse of the plane of the band, the lever being connected to a tension spring, the other end of the spring being connected to a member carried by the other end portion and projecting outwardly, and guiding means whereby the end portions slide relative to one another and are prevented from twisting away from one another when the lever is swung, the lever having a thumb piece projecting outwardly and disposed adjacent the band when in either extreme position.

3. Means for securing a cover to a shade comprising an expansible and contractible band of concave cross section to embrace adjacent edges of the cover and shade and having overlapping end portions adapted to slide relative to one another as the band is expanded or contracted, and means for contracting said band comprising a lever pivoted to the outer portion of the band adjacent the end thereof to swing in a plane transverse of the plane of the band, the lever being connected to a tension spring, the other end of the spring being connected to a member carried by the other end portion and projecting outwardly, said outwardly projecting member engaging the outer end portion of the band to guide the same and prevent twisting it away from the inner end portion when the lever is actuated, the lever engaging said outwardly projecting member when the lever is in the bandcontracting position.

4. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade and having overlapping end portions adapted to slide relative to one another as the band is expanded or contracted, and means for contracting said band comprising a lever pivoted to the outer end portion of the band to swing in a plane transverse of the plane of the band, the lever being connected to a tension spring, the other end of the spring being connected to an outwardly extending member carried by the inner end portion of the band and passing through a longitudinal slot in the outer end portion of the band.

5. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade and having overlapping end portions adapted to slide relative to one another as the band is expanded orcontracted, and means for contracting said band comprising a lever pivoted to the outer end portion of the band to swing in a plane transverse of the band, the lever being connected to a tension spring, the other end of the spring being connected to an outwardly extending member carried by the inner end portion of the band and passing through a longitudinal slot in the outer end portion of the band, the lever, when in the band-contracting position, being moved to pass the spring over the pivotal center of the lever and brought against the outwardly extending member.

6. Means for securing a cover to a shade com-' prising an expansible and contractible band embracing adjacent edges of the cover and shade and having overlapping end portions adapted to slide relative to one another as the band is expanded or contracted, and means for contracting said band comprising a lever pivoted to the outer end portion of the band to swing in a plane transverse of the plane of the band, the lever being connected to a tension spring, the other end of the spring being connected to an outwardly extending member carried by the inner end portion of the band and passing through a longitudinal slot in the outer end portion of the band, the lever engaging the outwardly directed member when in the band-contracting position and being brought against an outwardly extended stop when in the band-expanding position, the end of the lever having a thumb piece extending outwardly and disposed substantially at the middle of the band when it is in band-closing position.

7. In combination, a shade having an outwardly extending flange, a cover, clamping means for securing the cover to the shade, including an expansible and contractible band, a lever carried by one end portion of the band and cooperative with a spring carried by the other end portion of the band for contracting the hand against the shade, and a band-retaining device carried by the band and actuated by the lever when in bandexpanding position to be moved to overlie the flange.

8. In combination, a shade having an outwardly extending flange, a cover, clamping means for securing the cover to the shade, including an expansible and contractible band, a lever carried by one end portion of the band and cooperative with a spring carried by the other end portion of the band for contracting the band against the shade, and a plate carried by the band and movable inwardly by said lever to overlie the flange.

9. In combination, a shade having an outwardly extending flange, a cover, clamping means for securing the cover to the shade, including an expansible and contractible band, a lever carried by one end portion of the band and cooperative with a spring carried by the other end portion of the band for contracting the band, a band-retaining device carried by the band and actuated by the lever when in band-expanding position to be moved to overlie the flange, and stop means for permitting moving the lever beyond the position to actuate said device.

10. In combination, a shade having an outwardly extending flange, a cover, clamping means for securing the cover to the shade, including an expansible and contractible band, a lever carried by one end portion of the band and cooperative with a spring carried by the other end portion of the band for contracting the band against the shade flange, and a plate pivotally carried by the band above the plane of the reflector flange and projecting outwardly through a slot therein to be in the path of the lever when in the band-expanding position, the plate being movable by the lever to overlie the flange.

11. An expansible and contractible cover retaining band for reflectors comprising a split sheet metal ring having overlapping end portions and of U-shaped cross section, to accommodate a reflector flange and cover, the outer end of the ring being slotted, a slidable spring anchorage carried by the inner end of the ring and received within the slot, a lever pivoted to the outer end of the band to swing in a plane transverse of the plane of the band, the lever having a spring anchorage, and a contractile spring connecting the anchorages.

12. An expansible and contractible cover retaining band for reflectors comprising a split sheet metal ring having overlapping end portions and of U-shaped cross section, to accommodate a reflector flange and cover, the outer end of the ring being slotted, a slidable spring anchorage carried by the inner end of the ring and received within the slot, a lever pivoted to the outer end of the band to swing in a plane transverse of the plane of the band, the lever having a spring anchorage, a contractile spring connecting the anchorages, a plate pivotally carried by the upper side of the U and engageable by the lever to cam the plate inwardly to overlie the flange on the reflector.

13. In combination, a shade having a peripheral flange, a cover and an expansible and con tractible cover supporting band, the cover carrying a cover suspending member spaced below the cover, the band carrying a supporting hook extending underneath the suspending member and normally out of contact therewith, but adapted to receive said member when the cover is lowered so as to suspend the cover.

- LEROY C. DOANE. 

